My printer will not turn on
First, try pressing and quickly releasing the Power button to start a Power On/Off cycle. Do not hold down the button. If this resolves the problem your done; if not continue on.
Inspect the power cord for visible damage; if damaged will need to contact HP to replace.
Disconnect the power supply (power module and cord) from the power source (wall socket) and the printer.
Test the power source, wall socket with or without your power bar or surge protector in place, with a small appliance you know works to confirm you have power. You may want to test the wall socket first and then test the power bar, etc. to make sure each component is not the problem.
If the appliance works then need to investigate the power supply. If the small appliance does not work you may need to check your electrical panel for a tripped breaker and possibly consult an electrician to check your electrical wiring.
To test the power supply plug in to the working power source; if the green light on the power supply does not light up you will need to contact HP to replace the power supply.
If the green light on the power supply lights up; reconnect to the printer.
Press and quickly release the Power button to turn the printer on. if the printer does not turn on you will need to check the USB cable.
Disconnect the USB cable from the printer.
Press the Power button to turn on the printer; if the printer turns on you will need to replace the USB cable.
If printer does not turn on, check the battery if your printer has one. A red light means the battery requires recharging; if it is still red after recharging, replace the battery.
If none of these steps resolve your issue before replacing the power supply try plugging the power supply directly in to a different working wall socket with no power bar or surge suppressor.; Press the power button.
If still no power to the printer you need to replace the power supply.